Parts of plants below the soil which captures minerals and water from the soil is called the root. The types of root are:
- tap root system
- fibrous root system
Roots are modified for following purpose:
- For storage of food
- For mechanical support
- For vital functions
Leaves emerge from the stem. Leaf helps in photosynthesis and respiration. Leaves are modified in different forms according to an adaptation of plants. Some plants tend to have huge tendrils. Tendrils are usually coiled. Some leaves are modified into thorns which decrease the rate of transpiration. Thorns also protect the plants. Some leaves are as dry as paper. Some carnivorous plants have leaves with bladder to trap insects.
The types of modification of a stem are:
- underground modification
- Sub-aerial modification
- Aerial modification
The roots of radish, turnip and carrot are modified in following ways:
- Upper and lower parts of radish are thinner, but the middle part of a root is thicker in radish.
- In turnip, the upper part of turnip is round and broader but the lower part is narrower.
- In carrot, upper part is broader and the lower part is thinner and sharper like a pencil.